CVE-2026-104266 · GHSA-24cc-9352-h2pg
tinytag: Infinite loop when parsing certain M4A files containing invalid atoms
- Risk score
- 49/100
- CVSS
- 6.5 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 15 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- tinytag is a Python library for reading audio file metadata. From 2.0.0 until 2.3.0, an M4A file containing a sub-atom with a size of zero inside a ---- atom can cause the metadata parser to stop advancing through the input. The custom-field atom traversal repeatedly processes the malformed location, causing an infini…
- Affected
- tinytag (pip) >= 2.0.0, < 2.3.0
- Fix
- Upgrade tinytag to 2.3.0 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 6.5 medium
- On your watchlist: PyPI
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| tinytag | pip | >= 2.0.0, < 2.3.0 | 2.3.0 |
References
- https://github.com/advisories/GHSA-24cc-9352-h2pg
- https://github.com/tinytag/tinytag/security/advisories/GHSA-24cc-9352-h2pg
- https://nvd.nist.gov/vuln/detail/CVE-2026-104266
- https://github.com/tinytag/tinytag/pull/326
- https://github.com/tinytag/tinytag/commit/9ada221ba44990cb02cd9002d992186e037b515e
- https://github.com/tinytag/tinytag/releases/tag/2.3.0
- https://github.com/advisories/GHSA-24cc-9352-h2pg
Original description
tinytag is a Python library for reading audio file metadata. From 2.0.0 until 2.3.0, an M4A file containing a sub-atom with a size of zero inside a ---- atom can cause the metadata parser to stop advancing through the input. The custom-field atom traversal repeatedly processes the malformed location, causing an infinite loop and denying service to a program that reads the crafted file. This issue is fixed in version 2.3.0.
Last activity 15 Oct 2026. Patch Forecast updates every hour.